A5085734322- Per- and polyfluoroalkyl substances research
- Toxic Organic Pollutants Impact
- Atmospheric chemistry and aerosols
- Water Treatment and Disinfection
- Adsorption and biosorption for pollutant removal
- Pharmaceutical and Antibiotic Environmental Impacts
- Phosphorus and nutrient management
- Groundwater flow and contamination studies
- Air Quality and Health Impacts
- Advanced oxidation water treatment
- Odor and Emission Control Technologies
- Analytical chemistry methods development
- Water Quality Monitoring and Analysis
- Microplastics and Plastic Pollution
- Plasma Applications and Diagnostics
- Constructed Wetlands for Wastewater Treatment
- Carbon Dioxide Capture Technologies
- Asphalt Pavement Performance Evaluation
- Landfill Environmental Impact Studies
- Environmental remediation with nanomaterials
- Groundwater and Isotope Geochemistry
- Covalent Organic Framework Applications
- Health, Environment, Cognitive Aging
- Membrane Separation Technologies
- Wastewater Treatment and Reuse
North Carolina State University
2016-2025
North Central State College
2020-2025
Piedmont International University
2020
Technical University of Denmark
2006
University of Nebraska–Lincoln
2006
University of Oklahoma
2001-2004
Long-chain per- and polyfluoroalkyl substances (PFASs) are being replaced by short-chain PFASs fluorinated alternatives. For ten legacy seven recently discovered perfluoroalkyl ether carboxylic acids (PFECAs), we report (1) their occurrence in the Cape Fear River (CFR) watershed, (2) fate water treatment processes, (3) adsorbability on powdered activated carbon (PAC). In headwater region of CFR basin, PFECAs were not detected raw a drinking plant (DWTP), but concentrations high. The U.S....
This commentary presents a scientific basis for managing as one chemical class the thousands of chemicals known PFAS (per- and polyfluoroalkyl substances). The includes perfluoroalkyl acids, perfluoroalkylether their precursors; fluoropolymers perfluoropolyethers; other PFAS. approach is presented in relation to physicochemical, environmental, toxicological properties. Specifically, high persistence, accumulation potential, and/or hazards (known potential) studied date warrant treating all...
Micropollutants in wastewater present environmental and human health challenges. Powdered activated carbon (PAC) can effectively remove organic micropollutants, but PAC production is energy intensive expensive. Biochar adsorbents cost less sequester carbon; however, net benefits depend on biochar conditions treatment capabilities. Here, life cycle assessment was used to compare 10 impacts from the use of wood biochar, biosolids coal-derived sulfamethoxazole wastewater. Moderate capacity had...
For several decades, a common processing aid in the production of fluoropolymers was ammonium salt perfluorooctanoic acid (PFOA). Because PFOA is persistent, bioaccumulative, and toxic, its use are being phased out United States. In 2009, US Environmental Protection Agency stipulated conditions for manufacture commercial GenX, replacement. While GenX produced purposes, form also generated as byproduct during fluoromonomers. The discovery high concentrations related perfluoroalkyl ether acids...
From 1980 to 2017, a fluorochemical manufacturing facility discharged wastewater containing poorly understood per- and polyfluoroalkyl substances (PFAS) the Cape Fear River, primary drinking water source for Wilmington, North Carolina, residents. Those PFAS included several fluoroethers including HFPO-DA also known as GenX. Little is about bioaccumulation potential of these fluoroethers.
Per- and polyfluoroalkyl substances (PFASs) are widely used anthropogenic chemicals. The PFAS class includes almost 5000 registered compounds, but analytical methods lacking for most PFASs. total oxidizable precursor (TOP) assay was developed to indirectly quantify unknown PFASs that precursors commonly measured perfluoroalkyl acids. To understand the behavior of recently identified per- ether acids (PFEAs), including fluorinated replacements manufacturing byproducts, we determined fate 15...
Granular activated carbon (GAC) adsorption is well-established for controlling regulated disinfection byproducts (DBPs), but its effectiveness unregulated DBPs and DBP-associated toxicity unclear. In this study, GAC treatment was evaluated at three full-scale chlorination drinking water plants over different service lives 61 DBPs, 9 speciated total organic halogen (total chlorine, bromine, iodine). The represented a range of impacts, including algal, agricultural, industrial wastewater. This...
We quantified per- and polyfluoroalkyl substance (PFAS) transport from groundwater to five tributaries of the Cape Fear River near a PFAS manufacturing facility in North Carolina (USA). Hydrologic data were coupled quantify fluxes tributaries. Up 29 analyzed, including perfluoroalkyl acids recently identified fluoroethers. Total (ΣPFAS) was 20–4773 ng/L (mean = 1863 ng/L); range for stream water 426–3617 1717 ng/L). Eight constituted 98% ΣPFAS; perfluoro-2-(perfluoromethoxy)propanoic acid...
Abstract Lithium-ion batteries (LiBs) are used globally as a key component of clean and sustainable energy infrastructure, emerging LiB technologies have incorporated class per- polyfluoroalkyl substances (PFAS) known bis-perfluoroalkyl sulfonimides (bis-FASIs). PFAS recognized internationally recalcitrant contaminants, subset which to be mobile toxic, but little is about environmental impacts bis-FASIs released during manufacture, use, disposal. Here we demonstrate that concentrations...
Per- and polyfluoroalkyl substances (PFAS) are anthropogenic chemicals of concern that persist in the environment. Environmental monitoring revealed high concentrations hexafluoropropylene oxide dimer acid (HFPO-DA) other novel PFAS lower Cape Fear River; however, there is limited information on exposures effects this contamination aquatic biota. Serum 23 Striped Bass (Morone saxatilis) from River (n = 58) a reference population an aquaculture laboratory Pamlico/Tar watershed 29) were...
Per- and polyfluoroalkyl substances (PFAS) are an ensemble of persistent organic pollutants global interest because their associations with adverse health outcomes. Currently, environmental PFAS pollution is prolific as a result the widespread manufacturing these compounds chemical persistence. In this work, we demonstrate advantages adding ion mobility spectrometry (IMS) separation to existing LC-MS workflows for analysis. Using commercially available drift tube IMS-MS, characterized...